摘要:
A process for the recovery of a low concentration of ethylene oxide from an aqueous solution comprising salts, ethylene oxide and glycol which comprises the steps of:(1) passing the aqueous solution comprising salts and ethylene oxide through a hydrolyzing zone at elevated temperature and elevated pressure for a sufficient length of time to insure the conversion of at least the greater portion of the ethylene oxide to glycols to obtain a dilute aqueous glycol solution;(2) passing the dilute aqueous glycol solution through at least one flasher, wherein water is evaporated in the form of steam thereby producing at the bottom of the (last) flasher a solid-liquid two-phase slurry stream comprising salt-containing solids and a liquid phase comprising glycol, salt and water;(3) sending said slurry-containing stream coming out of the (last) flasher to a centrifuge and centrifuging such stream to produce a solid phase and a liquid phase; and(4) passing said centrifuged liquid phase to a flasher wherein glycols are separated.
摘要:
Process for preparing a basic lithium phosphate catalyst suitable for the gas phase isomerization of an alkene oxide to the corresponding alcohol, in which process an aqueous solution of a lithium compound is mixed in the presence of an alkali metal hydroxide with an aqueous solution of a phosphate salt or phosphoric acid, the process being characterized in that the aqueous solution of the phosphate salt or phosphoric acid is added evenly during a period of at least six hours to the homogeneously stirred aqueous solution of the lithium compound, upon which the precipitated lithium phosphate is washed with water and subsequently calcined.
摘要:
Described are tertiary pentamethylindanol derivatives defined according to the structure: ##STR1## wherein the dashed line represents a carbon-carbon single bond or a carbon-carbon double bond and uses thereof in augmenting or enhancing the aroma or taste of consumable materials selected from the group consisting of perfume compositions, colognes, perfumed articles, foodstuffs, smoking tobaccos and smoking tobacco compositions.
摘要:
New cycloaliphatic unsaturated ketones and their use as perfuming and odor-modifying agents in the manufacture of perfumes and perfumed products, and as flavoring and taste-modifying agents in the preparation of foodstuffs in general and imitation flavors for foodstuffs, beverages, animal feeds, pharmaceutical preparations and tobacco products.Methods for the preparation of said cycloaliphatic unsaturated ketones.
摘要:
A 1,1,1-trihalogeno-4-methyl-3-penten-2-ol is prepared by thermally isomerizing 1,1,1-trihalogeno-4-methyl-4-penten-2-ol. The isomerization reaction may be catalyzed by an acid or a transition metal of Group 6B, 7B or 8 of the Periodic Table of Elements, or a compound thereof. The 1,1,1-trihalogeno-4-methyl-3-penten-2-ol thus prepared is useful as a synergist for herbicides or a physiologically active compound, and, additionally, is useful as a starting material for the synthesis of 2,2-dimethyl-3-(2',2'-dihalogenovinyl)-cyclopropane carboxylic esters which are active ingredients of insecticides.
摘要:
An olefinic hydrocarbon is isomerized utilizing a catalyst system consisting essentially of a mixture of a nickel complex of the formula (R.sub.3 P).sub.2 NiX.sub.2 and an alkali metal borohydride.
摘要翻译:使用主要由式(R 3 P)2 N 1 X 2的镍络合物和碱金属硼氢化物的混合物组成的催化剂体系将烯烃异构化。
摘要:
Structural modification of olefinically unsaturated alcohols is achieved by contacting the unsaturated alcohol under reaction conditions with a catalytic amount of a catalyst composition comprising a ruthenium hydride complex of tertiary phosphine ligands.
摘要:
A method of re-arranging a tertiary vinyl carbinol having the structure:
by reacting the carbinol with a lower alkanoic acid, anhydride thereof or a mixture thereof in the presence of an acid catalyst to produce a re-arranged compound having the structure:
wherein X is the residue of the acid reactant. The resulting ester may be saponified to produce a compound having the structure:
which is the allylic isomer of the original vinyl carbinol.
摘要:
A process for preparing muscone for 1,9-cyclohexadecadiene involving a number of steps. Monoepoxidized 1,9cyclohexadecadiene upon treatment with alkyl lithium is converted into an Alpha , Beta -unsaturated alcohol and oxidized into the corresponding Alpha , Beta -unsaturated ketone. This upon treatment with alkyl magnesium halide in the presence of cuprous chloride is converted to Beta -methyl-cyclohexadecenone and then hydrogenated to homomuscone ( Beta -methyl-cyclohexadecanone). Homomuscone dibromide undergoes a Favorski rearrangement to produce a mixture Beta -and gamma -methyl-cyclopentadecenecarboxylates (3:7) which on treatment with hydrazoic acid is converted into Alpha -methyl-cyclopentadecanone and muscone, respectively.
摘要:
A process for the preparation of ambrettolide and isomers thereof from 1,9-cyclohexadecadiene. Diepoxidized 1,9cyclohexadecadiene is reduced to a mixture of cyclohexadecadiols and oxidized to the corresponding hydroxy ketones. These, upon oxidation in the presence of a boron trifluoride etherate catalyst, are converted into hydroxy cyclohexadecanolides which are dehydrated to form a mixture of isomers of ambrettolide which can be separated by conventional means, if desired.